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Posts Tagged ‘ R-english ’

A violin plot is a combination of a boxplot and a kernel density plot. Lattice includes the panel.violin function for this graphical tool. This example draws a violin and a boxplot together. First, let’s download some solar radiation data from the NASA webpage: nasafile <- 'http://eosweb.larc.nasa.gov/sse/global/text/global_radiation' nasa <- read.table(file=nasafile, skip=13, header=TRUE) Now, I plot a

The version 0.22 of solaR includes a new method, mergesolaR. It is designed to merge daily time series of several solaR objects. For example, we can obtain the daily irradiation of the whole set of meteorological stations of Madrid (Spain) and use this information to calculate the productivity of a grid connected PV system. It

The version 0.22 of solaR is now available at CRAN. Besides, solaR is now registered at R-Forge. A new mergesolaR method has been defined for merging solaR objects. The calculation of the sunset time has been improved. The voltage dependency of the efficiency curve of the inverter is now included in fProd and calcGCPV. The

In lattice, there is a function called splom for the display of scatter plot matrices. For large datasets, the panel.hexbinplot from the hexbin package is a better option than the default panel. As an example, let’s use some meteorological data from MAPA-SIAR: library(solaR) library(hexbin) aranjuez <- readMAPA(prov=28, est=3, start='01/01/2004', end='31/12/2010') aranjuezDF <- subset(as.data.frame(getData(aranjuez)), select=c('TempMedia', 'TempMax',

I few years ago, while I was working on kernel based density estimation
on compact support distribution (like copulas) I went through a series
of papers on circular distributions. By that time, I thought it was
something for mathematicians working ...

No need to do politics. Just take a statistical course. And I do not
talk about misinterpretation of statistics, but I talk about the
mathematical foundations of statistical tests. Consider the following
parametric test, with a one-dimensional para...

It is common to look at best
time at the Marathon. Or perhaps the distribution of the top100, as
done by John Myles White on his blog here
(data can be found there), as
the graph below, with the density of the time for the first 100 men (in blue) a...

A standard idea in extreme value theory (see e.g. here,
in French unfortunately) is that to estimate the 99.5%
quantile (say), we just need to estimate a quantile of level 95% for
observations
exceeding the 90% quantile.
In extreme value theory,...

Recently on his blog (here), Robin mentioned an amazing book, called "A Million Random Digits" published by RAND corporation. The book was initially published in 1955, but RAND published a nice (and expensive) second edition.
A great thing is that ...